firmware: tegra: bpmp: Add support on Tegra264

Support for Tegra264 depends on the Tegra186 support, so make sure the
latter is enabled.

Link: https://lore.kernel.org/r/20250506133118.1011777-11-thierry.reding@gmail.com


Signed-off-by: Thierry Reding <treding@nvidia.com>